Temperature-control device for heating systems



`une 26, 1928.

J. Ross TEMPERATURE COTROL DEVICE FOR HEATING SYSTEMS Filed June 14,1926 lll Patented .lune Z6, 1928..y

STAY

JAMES ROSS, OF EAST CLEVELAND, OHIO.

TEMPERATURE-CONTROL. DEVICE FOR HEATING SYSTEMS.

Application led .Tune 14,

This invention relates to a controlling device for heatinosystems andmore particularly to a device for auton'iatically regulating the supplyof fuel to thchcating unit and which is governed by the conditionsexisting at a given point in the system.

The main object of the inventionv is to provide a device of thecharacter described which is adapted to bc connected in the return lineof the heating unit to control the supply of fuel to the heating unit.

Another object of the invention is to provide a device of the characterdescribed which is simple and rigid in construction and which is welladapted for quantity production at comparatively low cost.

Another object of the invent-ion is to provide a control device forheating systems in which the expansion of a confined body of liquid isutilized to actuate a means for diminishing the supply of fuel to theheating unit in accordance with the temperature at a given point in thesystem.

. Further and` more limited objects of my invention will appear as thedescription proceeds and by reference to the accompanying drawing inwhich Fig. 1 is a diagrammatic view showing my control device connectedin a heating system; Fig. 2 is an enlarged vertical sectional view ofthe prcferred embodiment of my control device, and Fig. 3 is a viewsimilar to Fig. 2 taken at right angles thereto.

In Fig. 1 the numeral 1 designates a heating unit comprising a boiler 1,a combustion chamber 2 and a cold water supply pipe 3. To the upper endof the boiler 1 is connected a pipe 4 which leads to a radiator andconnected with the opposite side ofthe radiator is a return pipe 6 inwhich is connected my control. device designated generally at 7. Thefuel supply pipe 8 leads through the top of the control device 7. asshown, and the supply ofv fuel to the heating unit is controlled in amanner toA be hereinafter described.

YThe control device comprises a casing 9 and formed within the casing ischamber.

10 having a conduit 11 leading through the casing which serves as a ventand is normally closed by a plug 12. The lower end of the end of thechamber 10 is closed by a threaded cap 13 to which is connected a springpressed plunger 14, the purpose of which will hereinafter appear. A bore15 connects with the chamber l0 and lilfls 1926. Serial No. 115,814.

through the top of the casing and is closed by a screw cap 16. Slidablymounted in the bore 15 is a valve member 17 having a stern 18 leadingthrough an opening in the top of the cap 16. The stem 18 is providedwith a cap 19 which serves to limit the downward movement of the valve.The valve 17 is provided with a pair of ports 20 and 21 the purpose ofwhich will hereinafter appear. Extending through the upper part of thecasing, preferably at right angles to the bore 15, is a bore 22 to eachend of which is connected the fuel supply pipe 8. Extending through t-helower part of the casing, and preferably at right angles to the bore 22is a bore 23 to each end of which is connected the return pipe G. Froman inspection of the drawing it will be seen that the chamber. 10 isformed within the bore 23 and that the water returning from the radiatorthrough the pipe 6 passes around the chamber 10 and contacts with theWalls thereof.

O per@ tion.

Gas or other fuel is supplied through the pipe 6 and is ignited in thecombustion chamber 2 to heat the water in thevboiler 1. The hot waterpasses up through pipe l to radiator 5 and returns to the boiler throughpipe 6 and control device 7 to the boiler. The valve member 17 isnormally in the position shown in Fig. 2 with the port 2O in position toallow the fuel to be sup plied through pipe 8 to thel combustionchamber. lVhen the liquid in the return line and bore 23 reaches apredetermined temperature the water of other fiuid in chamber 10 will be'correspondingly heated and Will; expand due to the rise in temperatureand will actuate the valve 17 to diminish or cut off supply of fuel tothe combustion chamber. Should the water in the return linebe hot enoughto completely close the port 20, port 21 will be opened to allowsuflicient gas to pass through to ignite the pilot light. The casing isprovided with an opening 24 closed by a removable plug 25 and into whicha separate conduit may be connected for the pilot light, should the samebe necessary.

While I have described my control device as used with a hot Waterheating systemy my device is equally well adapted for use with asteam,vapor or hot air system and I Wish my invention to be limited only in,

claims. I also Wish it to be understood that my invention is not to belimited to a control device in Which Water or any other' liquid is usedin the expansion chamber as the device Will operate efficiently Withouta liquid in the expansion chamber. It is merely necessary to provide asealed chamber having a piston slidably mounted therein Which will varythe rate, of flow of the fuel in accordance with the temperature of thefluid adjacent the Walls of the expansion chamber.

It Will nou/f be clear that I have provided a device which Willaccomplish the objects of the invention as hereinbefore stated'.

Having thus vdescribed my invention, WhatI claim is:-l i

(1,., A cont-rol device for heating Vsystems comprising aV casing, a.fuel supply conduit leading .through said casing, acliquid returnconduit leading through .said casing, partitions in said liquid returnconduit defining a chamber, a bore connecting said chamber with saidfuel supply conduit, a

' valve slidably mounted in said bore for regulating. the supply o-ffuel to said heating unit. in accordance With the temperature at a.given point in the. syst-em.

In a. control device for heating systems, a casing, a. valve in saidcasing for regulating the supply of fuel to the heating unit, a liquidconduit leading through said casing, a chamberformed in said conduitadapted to be filled with liquid7 said valve projecting int-o saidchamber and adapted vto be moved the expansion of the liquid in saidchamber tol decrease the sup,- ply of fuel to said heating unit.

3. A thermostatic control device. fory heating systems comprising acasing, a fuel supply conduit extending through said casing, aI liquidreturn conduit extending through said casing below said fuel conduit,partitions vformed in said liquid return' conduit defining a chamber, a.bore connecting said chamber With said fuel supply lconduit,l a valveslidably mounted in said bore for controlling the supply of fuelto saidheating unit.

4. A control device for heating systems adapted to be connected in thereturn line tothe heating unit, comprising a casing, a bore vextendingthrough said `casing the opposite. endsI of which are adapted to beconnected with al fuel supplyconduit, a, second bore `extending throughsaidI casing at an angle to saidfi'rst bore the opposite ends of whichare adapted to ybei.connected Withr a Water return line, partitionsformed in said last mentioned bore defining a chamber, al third boreconnecting said first mentioned bore with said'chamber, al valveslidably mounted in said third bore for controlling the supply of fuelto said heating unit.

5. A device as set forth in claim l in Which said chamber is providedWith a spring pressed plunger to take care of excess pressure in saidchamber.

6. A thermostatic control device for heating systems comp-rising a.valve casing, a fuel. supply conduit extending through said casing, afluid return` conduit extending through said casing at an angle to saidfuel supply conduit, partitions formed in said fluid return conduitdefining ay chambeiga bore connecting said chamber with said fuel supplyconduit, a valve slidably ymounted in said bore for controlling thesupply of fuel through said fuel supply conduit.

7. A control device of the class described comprising a. casing, a boreextending through said casing the opposite ends of which are adapted to`be connected with a fuel supply conduit, a second` bore extendingthrough said casing at an angle to, said first bore the opposite ends ofWhich are adapted to be connected with. a fiuid return line, partitionsformed in said secondA bore and defining a chamber, a thirdbore leadingfrom. said chamber to the outsideof said casing Vand intersecting Vsaidfirst bore, a valve slidably mounted in said third bore and having oneor more passageways therein and adapted to regulate the supplyof'fuelthrough `said `first bore ingaccordance with the temperature at a. givenpointI within said casing.

8. A control device operable by the. force of expansion or contractionWithin a sealed chamber, to control the supply of fuel to va heatingunit and comprising a. casing,v a:

fuel sup-ply passageway .leading through said'ca'sing, saidv casinghavinga bore therein.. at an angle to said .passageway and defining anexpansion. chamber, a. pistonarranged VVWithin. the upper .portion of4said bore and havingone or vmore ports therein. and adapted to beactuated by the expansion or contraction .of the lfluid within expansion.chamber to regulate the How of fuel through said passageway v inaccordance with the temperaturepivithin said expansion chamber.

y In testimony whereof, I .hereunto affix my signature.

.imams Ross

